B00B0 code meaning
Driver Seat Occupant Classification Sensor A
What B00B0 means
B00B0 is the first of five classification inputs on the driver seat. No carmaker publishes this code, and J2012 leaves it to the maker which sensor the letter A means. Classification normally sits in the passenger seat; a Bosch patent notes that it can be omitted on the driver side, on the assumption that drivers are adults, or fitted there as well. One sensor type that could fill such a slot is a switch mat under the cushion: Autoliv patented a mat with 28 dome switches grouped in five zones, chosen from a 2,016-cell test mat loaded with FMVSS 208 dummies and child seats at several back angles. If B00B0 is stored, the restraint module no longer trusts that input, so adaptive driver airbag staging may be lost, and the airbag lamp is on.
B00B0 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of B00B0
- Airbag warning lamp on
- Driver airbag may deploy with a fixed instead of an adapted stage
- Safety note: airbag system; unplug seat and sensor connectors only de-energised (ignition off, battery off, wait time); calibrate the sensor after replacement, specialist workshop only
Common causes of B00B0
- Most likelyOpen or poor contact in the driver seat harness or plug to input A
- PossibleCushion sensor mat creased or damaged, e.g. after seat cover work
- Less likelySensor or seat replaced without the required zero-point calibration
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Driver classification sensor aSRS seat wiringSRS control module
What each part of B00B0 means
| B | Body system: airbags, seat belts, power seats, lights and climate control. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| B0 | The exact fault in that area. |
What to do next
- Note B00B0 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about B00B0
What does B00B0 mean?
B00B0 means "Driver Seat Occupant Classification Sensor A". B00B0 is the first of five classification inputs on the driver seat. It is a generic code, so it means the same on every make.
Is it safe to drive with B00B0?
B00B0 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will B00B0 fail an emissions test?
B00B0 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is B00B0 to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will B00B0 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.